Nombre

17

17 — Seventeen

17 is a prime, odd, a calendar year.

Seventeen is the seventh prime, and is famously the favorite ‘random’ number people pick when asked. It is the only prime that is the sum of four consecutive primes (2 + 3 + 5 + 7).

Sources https://en.wikipedia.org/wiki/17_(number)

Cousin Prime Curated Deficient Number Prime Recamán's Sequence Sexy Prime Squarefree Twin Prime

Propriétés

Parité: Impair
Nombre de chiffres: 2
Somme des chiffres: 8
Racine numérique: 8
Palindrome: Non
Inversé: 71
Suite de Recamán: a(25) = 17
Nombre de diviseurs: 2
σ(n) — somme des diviseurs: 18

Primalité

17 is prime. It has exactly two divisors: 1 and itself.

Diviseurs et multiples

All divisors (2)

1 · 17

Aliquot sum (sum of proper divisors): 1

Factor pairs (a × b = 17)

1 × 17

First multiples

17 · 34 · 51 · 68 · 85 · 102 · 119 · 136 · 153 · 170

Représentations

En lettres: seventeen
Ordinal: 17th
Chiffre romain: XVII
Binaire: 10001
Octal: 21
Hexadécimal: 0x11
Base64: EQ==

Aussi vu comme

Prime neighborhood

Adjacent primes:

Previous prime: 13 (gap of 4)
Next prime: 19 (gap of 2)

Pair status: twin with 19, cousin with 13.

ASCII character

As an ASCII codepoint, 17 is control character (0x11). ASCII control character.

Hex color

#000011

RGB(0, 0, 17)

IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.17.

Address: 0.0.0.17
Class: reserved
IPv4-mapped IPv6: ::ffff:0.0.0.17

Unspecified address (0.0.0.0/8) — "this network" placeholder.